Subaru 2003 Impreza - Manual (Page 345)

IMPREZA(NA) A1850BE-A (ENGLISH)
Maintenance and service
11-22
B Turbo models
1. Unsnap the two clamps holding the air cleaner
case cover.
1) Air cleaner case cover
2) Air cleaner element
2. Open the air cleaner case cover and remove the
air cleaner element.
3. Clean the inside of the air cleaner cover and
case with a damp cloth and install a new air cleaner
element.